N!

N! 
Time Limit : 10000/5000ms (Java/Other)   Memory Limit : 65536/32768K (Java/Other)
Total Submission(s) : 83   Accepted Submission(s) : 10
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Problem Description
Given an integer N(0 ≤ N ≤ 10000), your task is to calculate N!


Input
One N in one line, process to the end of file.


Output
For each N, output N! in one line.


Sample Input
1
2
3


Sample Output
1
2
6


Author
JGShining(极光炫影) 

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